Ratchet-drill



N0. 6H,253. Patented Sept. 27, I898.

\ J. HOULEHAN.

RATGHET DRILL.

(Application filed Dec. 9, 1897.)

(No Model.)

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UNITED STATES PATENT OFFIQE.

JOHN HOULEHAN, OF TOLEDO, OHIO.

RATCHET-DRILL.

SPECIFICATION forming part of Letters Patent No. 61 1,253, dated September 27, 1898.

Application filed December 9, 1897. Eierial No, 661,223. (No model.)

' numerals of reference marked thereon.

My invention relates to a device known in the art as a ratchet-drill, the object being to produce in a simple and compact form mech-' anism for rotating a head, stock, clutch, or other tool-holder, in which a drill, screwdriver, bolt, nut, or other article requiring a rotary movement may be placed and motion imparted thereto by the reciprocation of the handle in a longitudinal direction as distinguished from the usual rocking motion of the handle about the axis of the drill; This rotary movement can be imparted to the tool either by the inward or outward stroke of the handle or by both strokes, and in the latter case the rotation will be substantially continuous.

By my construction I am enabled to use a drill in places ordinarily inaccessible, and can also use it to insert or remove screws, bolts, or nuts when the ordinary screw-driver or wrench cannot or can only with great difiiculty be used.

Referring to the drawings, Figure 1 is perspective View of my invention. Fig. 2 is a vertical longitudinal section thereof. Fig. 3 is an elevation of the driving mechanism. Fig. 4 is a plan view of the same. Fig. 5 is a modification.

Similar numerals of reference indicate simi lar parts in the various figures.

The operating mechanism is contained within a casing 1, preferably round at one end, with the sides tapering to the opposite end, at which the operating-handle 2 is inserted. A plate 3, secured by screws to the casing, covers the operating mechanism. Within the casing 1 is a ratchet-wheel 4, having a hub 5, which projects laterally on each side thereof and turns freely in holes 6 7, formed in the casing l and the plate 2, respectively. Oollars 8 9 are mounted on the hub 5 and turn thereon, one being placed on either side casing with a collar 23.

oted by bolts 14 15. The ends of the arms 10 11 are preferably bent around the pivoted ends of the pawls, as shown, to form a sup port for the lower ends of the pivot-bolts. The pawls 12 13 are adapted to engage the teeth of the ratchet-wheel 4 and to be kept in engagement therewith by springs 16 17,

fixed to the arms 10 11 and bearing on the respective pawls 12 13. Pivoted to the arm 10 by the bolt 14 are a pair of links 18, which are pivoted at their opposite ends to a similar pair of links 19, turning on the bolt 15. The links 18 19 are pivotally connected by means of a bolt 20 to a plate 21, which is attached, through the medium of a pin 22, to the operating-handle 2. The construction is such that the arms 10-11 and links 18 19 together form a toggle theaction of which will cause the ratchet-wheel 4 to rotate. The 0perating-handle 2 is provided outside of the The pin 22, as will be seen by reference to Fig. 2, projects on opposite sides of the end of the operatinghandle within the casing and forms a stop to limit the outward movement of the handle, the collar 23 serving to restrict its inward movement.

To rotate the ratchet-wheel, the operatinghandle 2 is drawn out, straightening the toggle. This movement will cause the pawl 15,

which is in engagement with the ratchetwheel, to turn it in the direction of the arrow, and at the same time the pawl 14, moving in the direction opposite to that of the ratchetwheel, passes freely over the teeth. The handle having been withdrawn as far as the pin 22 will allow, it is then forced inward,

thus spreading the toggle. This will cause the pawl 14 to engage the ratchet-teeth and the pawl 15 to pass over them, turning the ratchet-wheel in the same direction as before. It will thus be seen that by continually mov ing the operating-handle in and out a prac tically continuous rotary movement is imparted to the ratchetwheel. A polygonal hole 4 is made through the hub 5 of the ratchet-wheel, in which a tool or tool-holder requiring a rotary movement can be placed.

To use my device in connection with a drill, I provide a tool-holder 24, such as is represented in Fig. 2, having a stem 25, made of square or other polygonal form in cross-section for a portion of its length, to fit the hole 4 in the hub of the ratchet-wheel 4:. The remainder of the stem is threaded and carries the usual elongated feed-nut 26, with its center point 27.

To secure the tool-holder in the ratchetwheel, its stem is first passed through the hole 4 until it rests upon the slightly-projecting hub 5. A nut 28 is then screwed upon the stem until it bears against the opposite end of the hub 5, projecting through the body 1, after which, the nut 26 being screwed on the stem, the device is ready fpr use.

The tool-holder 24 may be adapted to hold a drill, auger, screw-driver, nut, bolt, &c. As no lateral movement of the handle is required to operate the ratchet-wheel, my invention can be used in any place sufficiently Wide for its insertion.

Having described my invention, I claim- 1. In a device for operating drills and similar tools, the combination of a frame or casin g, a ratchet-wheel mounted within said casing, a collar surrounding the hub of the ratchet-wheel on each side of said wheel, an arm projecting radially from each collar and carrying a pawl, a handle adapted to slide lineally, and atoggle between said handle and the arms, by means of which, on the lineal reciprocation of the handle, the ratchetwheel and the tool-holder will be rotated, substantially as set forth.

2. In a device for operating drills and similar tools, the combination of a frame or casing, a ratchet-wheel mounted within said casing, a collar surrounding the hub of the ratchet-Wheel on each side of said wheel, an arm projecting radially from each collar and carrying a pawl, a handle adapted to slide lineally, a toggle between said handle and the arms, by means of which, on the lineal reciprocation of the handle, the ratchet-wheel and the tool-holder will be rotated, and stops for limiting the lineal reciprocation of the handle, substantially as set forth.

In testimony whereof I have hereunto set my hand and seal this 2d day of December, 1897.

JOHN noULnnAN. [1. 3.1

W'itnesses:

J. Y. TODD, H. T. GREEK. 

